Abstract: A toe-piece of a ski binding for ski mountaineering has a base, a first jaw, a second jaw, an activating lever, a joint, a housing, and elastic means. The first jaw is provided with a first guide, and the second jaw is provided with a second guide. The activating lever is rotatably coupled to the base. The joint is activatable by the activating lever, which includes a first sliding element slidably coupled with the first guide and a second sliding element slidably coupled with the second guide, so that the activation of the activating lever causes, via the joint, the rotation of the first jaw and the second jaw. The housing is borne by the base. The elastic means are arranged in the housing so as to push the joint to wedge against the first jaw and the second jaw.

Abstract: A rear portion of a ski mountaineering binding includes a base, a turret rotatable with respect to the base, a brake fixable to the ski for braking the ski, first elastic element arranged to exert a force to bring the brake into a braking configuration, and a hooking member borne by the base and having a hook for hooking the brake. The hooking member has engaged and disengaged configurations. A second elastic element pushes the hooking member into the engaged configuration. A cam borne by the turret has a pusher borne by the base, activatable by the cam and movable along a second movement path. The hooking member includes an abutment for abutting the pusher and is activatable by the turret via the cam and the pusher, to assume the disengaged configuration and alternately the engaged configuration.

Abstract: A front insert for a ski mountaineering boot has first and second heads, positionable on lateral portions of a front part of the boot, a first housing in the first head, a second housing in the second head, and two contact elements with respective holes for coupling with respective hooking elements of a binding. The housings and respective ones of the contact elements are reciprocally conformed so as to enable the contact elements to displace from internal positions with respect to the housings, towards the outside, so that the contact elements orient with respect to the housings so that the holes can misalign from an alignment axis to maintain the contact with the hooking elements following a rotation of the ski boot with respect to the ski.